package com.lx.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.lx.common.constant.AuthServerConstant;
import com.lx.common.exception.BizCodeEnum;
import com.lx.common.to.MemberRespVo;
import com.lx.common.utils.R;
import com.lx.gulimall.auth.feign.MemberFeignService;
import com.lx.gulimall.auth.feign.ThirdPartyFeign;
import com.lx.gulimall.auth.vo.UserLoginVo;
import com.lx.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import javax.validation.constraints.NotEmpty;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author lixun Email:lx3027@126.com
 * @create 2021-08-02 16:01
 */
@Controller
public class LoginController {

    @Autowired
    private ThirdPartyFeign thirdPartyFeign;

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Autowired
    private MemberFeignService memberFeignService;

    @ResponseBody
    @GetMapping("/userInfo")
    public String userInfo(@RequestParam("token") String token){
        String s = stringRedisTemplate.opsForValue().get(token);
        return s;
    }

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {
        String redisCode = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if(!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis() - l < 60000){
                return R.error(BizCodeEnum.SMS_CODE_EXCEPTION.getCode(),BizCodeEnum.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        String code = UUID.randomUUID().toString().substring(0, 5) + "_" + System.currentTimeMillis();
        stringRedisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, code, 5, TimeUnit.MINUTES);
        String s = code.split("_")[0];
        thirdPartyFeign.sendCode(phone, s);
        return R.ok();
    }

    /**
     *  todo 重定向携带数据，利用session 原理 将数据放在session中
     *       只要跳转到下一个页面取出这个数据以后，session里面的数据就会删掉
     *
     *  todo 1.分布式下的session问题
     *
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/register")
    public String register(@Valid UserRegistVo vo,
                           BindingResult result,
                           RedirectAttributes redirectAttributes){

        if(result.hasErrors()){

            Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors", errors);
            // 校验错误，转发到注册页
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        // 1.核验验证码
        String code = vo.getCode();

        String s = stringRedisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)){
            if(code.equals(s.split("_")[0])){
                // 验证码正确
                // 删除验证码 令牌机制
                stringRedisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());

                // 真正的注册，调用远程服务进行注册
                R register = memberFeignService.register(vo);
                if(register.getCode() == 0){
                    // 成功
                    return "redirect:http://auth.gulimall.com/login";
                }else {
                    // 失败
                    Map<String,String> errors = new HashMap<>();
                    errors.put("msg", register.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors", errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else {
                Map<String,String> errors = new HashMap<>();
                errors.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors", errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors", errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

    }


    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if(attribute == null){
            return "login";
        }else {
            return "redirect:http://gulimall.com";
        }
    }

    /**
     * 登录
     */
    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session) {
        R login = memberFeignService.login(vo);
        if(login.getCode() == 0){
            // 成功
            MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER, data);
            return "redirect:http://gulimall.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg", login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }
    }

}
